{"title":"利用旁路栅极驱动器和 8 位 PWM 对矩阵式 LED 进行精确的单独照明控制","authors":"Jonghyuk Chae;Jaehun Jeong;Byeongha Park;Seungju Lee;Jongmin Park;Jinwook Burm","doi":"10.1109/TCSII.2024.3448489","DOIUrl":null,"url":null,"abstract":"Precise illumination control of matrix light-emitting diode (LED) headlamps is crucial for both energy efficiency in electric vehicles and driver safety. Enhancing energy efficiency extends the range of electric vehicles, while ensuring reliable illumination improves driver safety in autonomous vehicles. This brief discusses the control of illumination for eight serially connected LEDs using 8-bit pulse-width modulation (PWM) combined with a gate driver. A bypass gate driver, employing a cascode current mirror structure, manages the current through each LED, minimizing variations in analog string voltage. The proposed method supports 256 levels of illumination adjustment, making it suitable for adaptive front-lighting systems (AFLS). Implemented with TSMC’s 180-nm high-voltage CMOS technology, with a maximum power supply of 70V and a chip size of 5 mm2, the system ensures precise LED control and effectively prevents overcurrent.","PeriodicalId":13101,"journal":{"name":"IEEE Transactions on Circuits and Systems II: Express Briefs","volume":"71 11","pages":"4653-4657"},"PeriodicalIF":4.0000,"publicationDate":"2024-08-23","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":"0","resultStr":"{\"title\":\"Precise Individual Illumination Control of Matrix LED With Bypass Gate Driver and 8-Bit PWM\",\"authors\":\"Jonghyuk Chae;Jaehun Jeong;Byeongha Park;Seungju Lee;Jongmin Park;Jinwook Burm\",\"doi\":\"10.1109/TCSII.2024.3448489\",\"DOIUrl\":null,\"url\":null,\"abstract\":\"Precise illumination control of matrix light-emitting diode (LED) headlamps is crucial for both energy efficiency in electric vehicles and driver safety. Enhancing energy efficiency extends the range of electric vehicles, while ensuring reliable illumination improves driver safety in autonomous vehicles. This brief discusses the control of illumination for eight serially connected LEDs using 8-bit pulse-width modulation (PWM) combined with a gate driver. A bypass gate driver, employing a cascode current mirror structure, manages the current through each LED, minimizing variations in analog string voltage. The proposed method supports 256 levels of illumination adjustment, making it suitable for adaptive front-lighting systems (AFLS). Implemented with TSMC’s 180-nm high-voltage CMOS technology, with a maximum power supply of 70V and a chip size of 5 mm2, the system ensures precise LED control and effectively prevents overcurrent.\",\"PeriodicalId\":13101,\"journal\":{\"name\":\"IEEE Transactions on Circuits and Systems II: Express Briefs\",\"volume\":\"71 11\",\"pages\":\"4653-4657\"},\"PeriodicalIF\":4.0000,\"publicationDate\":\"2024-08-23\",\"publicationTypes\":\"Journal Article\",\"fieldsOfStudy\":null,\"isOpenAccess\":false,\"openAccessPdf\":\"\",\"citationCount\":\"0\",\"resultStr\":null,\"platform\":\"Semanticscholar\",\"paperid\":null,\"PeriodicalName\":\"IEEE Transactions on Circuits and Systems II: Express Briefs\",\"FirstCategoryId\":\"5\",\"ListUrlMain\":\"https://ieeexplore.ieee.org/document/10644111/\",\"RegionNum\":2,\"RegionCategory\":\"工程技术\",\"ArticlePicture\":[],\"TitleCN\":null,\"AbstractTextCN\":null,\"PMCID\":null,\"EPubDate\":\"\",\"PubModel\":\"\",\"JCR\":\"Q2\",\"JCRName\":\"ENGINEERING, ELECTRICAL & ELECTRONIC\",\"Score\":null,\"Total\":0}","platform":"Semanticscholar","paperid":null,"PeriodicalName":"IEEE Transactions on Circuits and Systems II: Express Briefs","FirstCategoryId":"5","ListUrlMain":"https://ieeexplore.ieee.org/document/10644111/","RegionNum":2,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"","PubModel":"","JCR":"Q2","JCRName":"ENGINEERING, ELECTRICAL & ELECTRONIC","Score":null,"Total":0}
引用次数: 0
摘要
矩阵式发光二极管（LED）前大灯的精确照明控制对于电动汽车的能效和驾驶员的安全至关重要。提高能效可延长电动汽车的续航里程，而确保可靠的照明可提高自动驾驶汽车的驾驶安全性。本简介讨论了使用 8 位脉宽调制 (PWM) 结合栅极驱动器控制八个串联 LED 的照明。旁路栅极驱动器采用级联电流镜结构，管理通过每个 LED 的电流，最大限度地减少模拟串电压的变化。所提出的方法支持 256 级照明调节，因此适用于自适应前照明系统 (AFLS)。该系统采用台积电 180 纳米高压 CMOS 技术，最大供电电压为 70V，芯片尺寸为 5 平方毫米，可确保精确的 LED 控制，并有效防止过流。
Precise Individual Illumination Control of Matrix LED With Bypass Gate Driver and 8-Bit PWM
Precise illumination control of matrix light-emitting diode (LED) headlamps is crucial for both energy efficiency in electric vehicles and driver safety. Enhancing energy efficiency extends the range of electric vehicles, while ensuring reliable illumination improves driver safety in autonomous vehicles. This brief discusses the control of illumination for eight serially connected LEDs using 8-bit pulse-width modulation (PWM) combined with a gate driver. A bypass gate driver, employing a cascode current mirror structure, manages the current through each LED, minimizing variations in analog string voltage. The proposed method supports 256 levels of illumination adjustment, making it suitable for adaptive front-lighting systems (AFLS). Implemented with TSMC’s 180-nm high-voltage CMOS technology, with a maximum power supply of 70V and a chip size of 5 mm2, the system ensures precise LED control and effectively prevents overcurrent.
期刊介绍：
TCAS II publishes brief papers in the field specified by the theory, analysis, design, and practical implementations of circuits, and the application of circuit techniques to systems and to signal processing. Included is the whole spectrum from basic scientific theory to industrial applications. The field of interest covered includes:
Circuits: Analog, Digital and Mixed Signal Circuits and Systems
Nonlinear Circuits and Systems, Integrated Sensors, MEMS and Systems on Chip, Nanoscale Circuits and Systems, Optoelectronic
Circuits and Systems, Power Electronics and Systems
Software for Analog-and-Logic Circuits and Systems
Control aspects of Circuits and Systems.
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